package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.mapper.DishMapper;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {

    @Autowired
    private DishFlavorService dishFlavorService;

    /**
     * 保存菜品和口味数据  11:04
     *
     * @param dishDto
     */
    @Override
    @Transactional
    public void saveWithFlavor(DishDto dishDto) {
        //1. 保存菜品数据
        this.save(dishDto);

        //2. 保存菜品口味数据
        List<DishFlavor> flavors = dishDto.getFlavors();
            for (DishFlavor flavor : flavors) {
                // 设置口味的dish_id
                flavor.setDishId(dishDto.getId());
            }
        dishFlavorService.saveBatch(flavors);
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     * @param id
     * @return
     */
    public DishDto getByIdWithFlavor(Long id) {
        //查询菜品基本信息，从dish表查询
        Dish dish = this.getById(id);  //Dish 没有口味集合数据

        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish,dishDto); // dishDto 没有口味集合数据

        //查询当前菜品对应的口味信息，从dish_flavor表查询
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dish.getId());
        List<DishFlavor> flavors = dishFlavorService.list(queryWrapper);
        dishDto.setFlavors(flavors);

        return dishDto;
    }


    @Transactional
    public void updateWithFlavor(DishDto dishDto) {
        //1. 更新dish表基本信息
       updateById(dishDto);

        //2. 清理当前菜品对应口味数据---dish_flavor表的delete操作
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper();
        queryWrapper.eq(DishFlavor::getDishId,dishDto.getId());
        dishFlavorService.remove(queryWrapper);

        //3. 添加当前提交过来的口味数据---dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();
        for (DishFlavor flavor : flavors) {
            // 设置口味的dish_id
            flavor.setDishId(dishDto.getId());
        }
        dishFlavorService.saveBatch(flavors);
    }

}


